Detachable coupling for electric fixtures.



M. CRUQET & M. H. GOLDSMITH. DETAGHABLE COUPLlNG FOR ELECTRIC FIXTURES.

APPLICATION FILED SEPT- !2, 1914- Patented Mar. 7, 1916.

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Patented Mar. 7,1916. ham, 914aSe man;

'iseotion to the coupling; and Fig; 8 is a similar view illustrating another method of joining the coupling but with the parts in ;f positionprior to'the connecting thereof. 60 i 1 portable electrolier or stand 10 is shown fol" table or floor use and having extendsyi'ertlca'lly through the portable and isdesignedto carrythe electric wires 13 for convyiiig the current to the lamp bulbs.

lieu-of formingthe fixture andportable has asing1epart5'as heretofore, the 70 141 is: made separate from the portgbeingunder'sto'od that the fixture ayghe tbnstru'cted in any preferred way andproyidedWith a shade 15 ifdesired. Thesej ifixtures are provided with varying 75.

nbers (iflarjhp' sockets 16 tosuitthe'partieulaprequirements, and for purposes of lustrationya fixture is shown in Fig. 1 provided with two of 1 such sockets and in Fig. 218; fixture of similarconstruction is 80 shown provided with foursockets and pull eords ior Chains lTfoi' operating the switches of thekfojckets to control the extinguishin or lightihg off't he electric light bulbs 18 carriedbj the sockets 'jf a Heretofofeinorderfto change thefnumer of "sotkets' soas'to provide a greater or ess number of lamps for a particular fixre itjjwas-nec'essaryto practioally recon truetfthe fiktui and rewire both it and 9 hefstand Whichfwere eonstructed in one,

hisjf ng the ortables and fixtures ired so that the fixtures with numbers j of I lights can t be ,at- 195 any portable or *electi'olier. .For' p sefan "improved detachable eonvidedythesarjne comprising, a the form of a circularshelh d onConnection-Withtheeiiteriorly In carryingfthe invefxtioninto practice,

ngupi ight position. A; tube or conduit 12 g an nterio z lyf threaded portion 20 threaded end of the conduit so that the lower end of the fixture may also vcontact with the section 22 and inc'lose the coactlng ends of said section and the tube.

The electric. fixtures. such as thefixture 14, whileusually of brass, may be ofany. suitable material and may be attached'to all styles of portablesjand elcctroliers,

whether wood. 1 metal. -china. glass." composrtion or any material used forportables ol' electrollers. and for this purpose the sections 19 and 22 are "provided with enlarged.

flanged'portions Qland 25. respectively, the flanged portion 2-?) or the flanged portlon which is exteriorlylocated to snugly receive Qotthe invent on to. a hanging electric light ing fixture. -10 is illustrated in which the the other. providing a shoulder 26 for contact by the edge of the other flangedportion, whereby in addition to'making the sections of the coupling of such diameter as to form a firm connection to prevent lateral play. a POSlllVB'SIlppOltlHg face or; surface for the fixture is produced.

The sections 19 and may be connected by providing one flange with bayonet slots 27 to receive pins or bolts 28 projecting out- .wardly from the other flange so that-by passing the pins or bolts into the slots and rotating the fixture the pins will travel along the inclined edges of the slots so that the parts will be drawn intobinding en- In lieu of providing the bayonet gagement. slots 27 with the entrance openings 29 through which the pins 28 enter' from the free edges of-one flange, said slots may be pressed outwardly as shown at 30 beyond the external face of theflange to permit the entrance of out-pressed projections or beads 31 carriedby the other flange into the slots forsimilarly bringing the sections ofthe coupling into binding engagement.

Mountedin each coupling section is an in-.

sulator 32 of fiber. porcelain, hard rubber or composition. it being understood that the coupling sections may lw'made of metal suits ably insulated or porcelain if desired; 'The conductors or electric wires 13 are attached to terminals 33 of contacts 34 anchored to the insulator in the section 19 and the elec-" 'tric conductors or wires 35 of the fixtures.

extend through the tube 21-. and correspond ingly through a central opening in the conductor. as in the case of the wires 13, and are connected to the terminals 36 of spring contacts 37 anchored .to the insulatorin the section 22 and projectingslightly from the flange portion or edgethereof so that -when the coupling sections are brought together and rotated the contacts will be brought into engagement to completethe circuit through I the lamps to pernnt the lighting thereon 'The wires 35 areal-ranged 1n aurordance with the number lanips carried by the screws 38 to permit their convenientllfefixture without modifying theconstruction of the contacts so thatthe fixtures provided with the various numbers of lamps are all-- suitable for attachment to the portable? or r ca electroliers without any change orjinog li tion or necessitating the rewiring offthe parts. The insulators are shown attached to the sections of the coupling JY-IHGMIS of In' Fig. 3 of the drawlngs the application lower end of the latter isprovided with a. coupling section 41 corresponding to th'e'section :22. while the. lighting fixture-.42 attached thereto is provided'with a coupling section 43 cm'responding t6"the section 19, the; parts being connected to operate in the same manner as heretofore described. It is also 'uiulerstood that the couplin is adapted for application to various otier electric lighting fi'vtures'or electroliers well within the scope of the invention and will lessen the .cost and danger of .breakingfixtures in packing andshipping. permit the manufac-. turer. jobber, dealer ol-consumer to change the number of Y lights. of any portable" equipped with the device-to afixture with any number of lights he may require without rewiring the portable or fixture;

.Having thus described our invention, what we claim as new and desire to secure Ly Letters Patent is z I y .A coupling of the class described comprising a pair of coupling sections eachhaving an annular flange. the flanges being telescopically fitted and detachably fastened by a slot and pin bayonet connection, a plate of insulationfastened in each section and of considerably lessthickness than the axial dimension of the flange. whereby a chamber isformed between the plates. of the two sections. spring. contacts on the opposed faces: of the insulation plates and shaped to engage and discngage'by the relative turning of the sections in connecting and d sconnectt. the 1=\tte1. and conductors extending through eachplate and fastened to the tacts thereon.

, In test mony whereof we have signed our names to'this specification in the presence of two subscribing witnesses.

JOSEPH MfirURUD (RUG-ET.

MAX HERMAN GOLDSMITH. Witnesse I Mame Russo. Ross Goaonn. 

